Iris D.S. Orizar, Ph.D.

Contact:
iorizar@msi.upd.edu.ph

Education:
Ph.D. Wildlife Biology, Faculty of Biological and Environmental Sciences, University of Helsinki

M.Sc. Marine Science, The Marine Science Institute, University of the Philippines, Diliman

B.Sc. Biology, Department of Biology, University of the Philippines, Baguio

Research Interests:
Biological and chemical interactions; predicted modeling; nutrient biogeochemical cycling; harmful algal bloom; ocean acidication; climate change; stoichiometry; ecosystem modelling

Selected Publications:

• Orizar, I.D.S., & A.M. Lewandowska, (2025) Interspecific trait variability and plasticity of the Baltic Sea phyplankton species along a salinity gradient. J. Plankton Res. 47 (3). DOI: 1093/plankt/fbaf015
• Roth, S.K., C. Uth, I.D.S. Orizar, A. Rico, P. Hedberg, A. Norkko, A. Lewandowska, 2025. Synergistic effects of the antibiotic ciprofloxacin and a simulated heatwave on the Baltic Sea dinoflagellate Apocalathium malmogiense. Marine Environmental Research 208(2025) 107155. https://doi.org/10.1016/j.marenvres.2025.107155
• Azanza, R.V., P.P. Rivera, I.D.S. Orizar, G.S. Jacinto, L.T. David, & V.M. Vargas-Nguyen. (2024) Harmful algal blooms (HABs) management in tropical marine food production areas amidst climate change. Transaction NAST Phl 46. DOI: 10.57043/transnastphl.2024.5323
• Orizar, I.D.S., S. Repetti, & A.M. Lewandowska, (2024) Phytoplankton stoichiometry along the salinity gradient under limited nutrient and light supply. J. Plankton Res. 46 (4). DOI: 10.1093/plank/fbae031
• Orizar, I.D.S., and A.M. Lewandowska, (2022) Intraspecific trait variability of a diatom and a dinoflagellate along a salinity gradient. Front. Mar. Science. 9, 880309. DOI: 10.3389/fmars.2022.880309
• Raghab, R., T. Miyajima, A. Watanabe, M. Yoshikai, C.M. Ferrera, I.D.S. Orizar, T. Nakamura, M.L. San Diego- McGlone, E.C. Herrera, & K. Nadaoka, (2021) Dissolved and particulate carbon export from a tropical mangrove-dominated riverine systems. Limnol. Oceagr. 66(11), 3944 – 3962. https://doi.org/10.1002/lno.11934
• Orizar, I.D.S., P.P. Rivera, M.L. San Diego-McGlone, & R.V. Azanza, (2013) Harmful algal bloom (HAB) mitigation using ball clay: Effect on non-target organisms. J. Environ. Sci. Manag. (2013), 36 –43. (Full text)

Article in preparation

• Orizar, IDS, R. Isah, & CM Ferrera. [In prep]. Characterization of coastal and offshore water chemistry in the West Philippine Sea. Limnology and Oceanography.